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Finding the Fourth Proportional to 99,393.78, 137,167.02 and 56,960.52

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Solution

The fourth proportional to 99,393.78, 137,167.02 and 56,960.52 is: 78,607.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,393.78 : 137,167.02 = 56,960.52 : x
  2. Step 2: Convert to fraction form
    99,393.78/137,167.02 = 56,960.52/x
  3. Step 3: Cross multiply
    99,393.78x = 137,167.02 × 56,960.52
  4. Step 4: Simplify right side
    99,393.78x = 7,813,104,786.05
  5. Step 5: Solve for x
    x = 7,813,104,786.05/99,393.78
  6. Step 6: Final answer
    x = 78,607.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.